Welt cementing and applying machine



Jan. 15, 1946.

J. R; OLIVER WELT CEMENTING AND APPLYING I AACHINE 4 Sheets-Sheet 1 Filed March 24,1945 I In venior John R. OZ i ven Jan. 15, I946. J. RLwE 2,392,941

WELT CEMENT ING"AND APPLYING MACHINE fnvenzor JohnR. Oliver:

Jan.15,1946. J. R. OLIVER I I 2,392,941

WELT CEMENTING AND APPLYING MACHINE- F iled Ma chu, 1945 4 Sheets-Sheet 5 F i" a 62 ln'venior JBhn 73. Oliver.

Jan. 15, 1946;

J.. R. OLIVER 2,392,941 WELT CEMENTING AND APPLYING MACHINE Filed March 24, 1945 4 Sheets-Sheet 4 V I??? A50 12% J00 53 umnmlm 'W /Z I 3:21-2: 2 /4-- v u B wz [Hz/anion John R. Oliver. By h 's Afforney. (I

Patented Jan. 15, 1946 s PATENT OFFICE WELT: CEMENTING AND APPLYING MACHINE John R. Oliver, Beverly, Mass, assignor to United Shoe Machinery Corporation,

Fl mington,

NJJL, a corporation of New Jersey Application March 24, 1M5, Serial No. 53 ,557

14 Claims. (CI. 1251) This invention relates to welt cementing and applying machines and is herein illustrated as embodied in a machine for adhesi ely attaching a welt strip to an outstanding flange of a shoe adjacent to the welt crease.

A machine for applying welts to shoe flanges shoe flange must be carried out as a sepamtev operation, as must the application ofcement to this welt strip or to the shoe.

An object ofthe present invention is to provide animproved machine of this typeby. means of which the related operations may be more 'eco- I nomically-carriedout. v i

In accordance with this obiectshoe-feeding mechanism is provided in predetermined relation to a welt-strip-feeding mechanism and, as herein illustrated, this shoe-feeding mechanism grips the inseam material forming the flange of the shoe, the arrangement being such that the welt and; the shoe: are iedfcrwardlyat corresponding oriit may beat identical rates.

ieaturejofthe invention resides; in, thecombinatlonlota device iortrimming away the superfluous material of the inseamnfiange with-such an improved mechanism.

"In accordance with another feature. of the invention, there. is associated with. the work-feedinadevices-an adhesive-applying mechanism by means of which a suitableccment may beapplied to; the. edge of the welt strip or to the shoeflans or. to hothyiu'stprior to their'contact as the attaching operation proceeds. its illustrated ".form, :this adhesive applyins mechanism comprises-a nozzle havin one or more-outletzopm- 'inss adjacent to the: edge of the: welt and/or to the inclined.- shoo fl ng and-it. is contemplated that. thisnozalesmay. be supplied. with cement.

such as; a; heated thermoplast c material. which is delivered under pressure to the nozzle.

These and other fe tur s. of this invention will hestbe: understood from azoonsiderationoi the followin specification taken n connection with the acc mpanyin drawinssain which i Fig. 1 is-a' front elevation oi the machine;

il -lat isaa-sidezele ation; with parts,- broken awarandinseotion:

.- Fiend isan' emer ed view ioo sinczdown on the top of the welt-strip-presenting and cutting-01f mechanisms;

Fig. 4 is a side elevation thereof with .parts broken awayand in section;

Fig. 5 is av vertical section through the weltpresenting mechanism; l

Fig. 6 is a fragmentary view on a much larger scale, substantially in horizontal section through the flange of a portion of a shoe and through an extruding nozzle and looking down on the top of the welt-strip-presenting device;-

Fig. '7 is a vfront elevation of the work-feedin parts and withthe nozzle shown in vertical section; and

Fig. 8 is an enlarged detail in elevation showin the feed rolls for the shoe flange and the relation of the applying nozzle thereto. I

In order to present a strip oiwelting, there is provided a mechanism similar to that disclosed l2 overhanging thehub oi the disk, said flange providing a-horizontal face engagingthe upper face of awelt strip W-and cooperating. with a lowerdisk l4 engaging the under face of said strip. At .theinner edge of the flange is an abutment against which the flat edge of. the

welt rests so that the strip is hold horizontally with its beveled edge exposed. This mechanism is mounted in a subframe 20 secured by screws 22 (Fig.2) to a horizontalplate 24 forming an integral part of the main frame 26 and extending transversely of the front face of this frame. On this subframe 2B is an upstanding sleeve 28 (Fig. 5). in which there is journaled a depending stud 30 forming an integral part of the upper disk Ill. Around the sleeve 28 is a hemispherical cup 32 forming part of the subframezll and receiving a spherical projection 34 on the under face of the lower disk M. Ail-opening at the center of this spherical projection 34 lar er than the eeve 28 50 that the lower disk: l4;may tilt slightly under the influence of a dragtinger 36 (Fig. 4)

v,from. Fi wthat theunder surface of the dragfinger 36=.-is rounded to-rcduce its fIiGtiQn-With the upper surface ofthedisk l4. It will be noted,

also, that-the point of engagement: ofsaid drasfin er. ith th o r di k 14 is ofisct slightlybeyOnd avertical. plane throu h the axis of :said

disk and normal to the front face of the frame 26 and, as a result, the point of greatest pressure upon the welt strip is diametrically opposite this drag-finger and hence at about the position indicated by the arrow C in Fig. 3.

To drive the disks I and I4 which present the welt-strip, there is provided a-gear train comprisinglapinion 50,,(Fig. 5), which'is-integr'al with the top disk II), a large gear 52 (Fig. 3)

journaled on a stud 53' held by a setscrew 54, a. pair 'of gears 56, 58 (Fig. 4) on another stud in the subframe, and a bevel gear 60. This bevel gear 60 is at the lower end of a shaft 62 journaled at that end in the subframe and at its upper end in a bracket 64 (Fig. 2) detachably mounted upon another bracket 66 which is secured to a portion of the main frame 26.

Power to drive the machine, and in particular the welt-feeding mechanism, is received from/a driving belt (Fig. 1) and delivered to a pulley 12'on a shaft 14 journaled in the frame of the machine, On this shaft, is a large gear 16 meshing with a gear 18 (Fig; 2) on a shaft 80 also journaled in the frame of theimachine and having near its mid-portion a helical gear 82. Meshed with this gear 02 is another helical gear 84 rotatable upon the upright shaft 62 and adaptedto be joined thereto by a clutch 86 operated bya bell crank 88 which is pivoted at 90 in the bracket 64. and is adapted to be raised to close the clutch upon operation of a rod 92 joined to one end of a lever 04 the other end of which is connected to a treadle rod 96. When the operator depresses the treadle connected'to the rod 66, the lever 94 will be rojcked on its shaft 95, thus raisin the rod 92 to close the clutch yieldably under the action of a spring 08 surroundingthat rod. I

In order that the strip may be severed at the "end of a particular operation; a cutting-off knife I00 (Fig. 4) has been providedw ich is mounted one slide I02 guided in a box I04 which is integral with a portion I06 (Fig. 2) of the bracket 6.6. ,This knife slide I02 is intended to be actuated. by the operator when desired and, to that' end,,is provided with a rack which meshes with ja segment I08 pivoted in the box. The segment is joined by a link IIO (Fig. 4) to the upper endofan arm II2 forming part of a bell crank,

theilower arm of which is, shown at H4 in Fig. 2; Attached to this bell-crank arm is another treadle rod IIB, Depressionof the f treadle will be efiective to cause a forward movement (to the left in Fig. 4) of the knife 'blade I00to sever thewelting and, for this purpose, theupperd Sk I0 is provided witha series of radial slots IIB. It is essential, therefdre that one of these slots shall be aimed with the knife blade and. to that.

end,jthe double gear 56, 58 is provided with a star wheel I20. The upright arm II2, with its upper end turned inwardlyover' the gear 52; carries a yieldably mounted pin I22 (Fig; 3) with a beveled end which fits in one of the notches of the star wheel. When the pin strikes the star wheel, it aline'sthe slots in the disk I0 with the knife before the movement oi the latter into one "ofthose slots. y 7 To assist theoperator in presenting a shoe. having an. outturned flange E (Fig. ,4) adjacent to thednseam andg hence the welt crease, in inclined; position for the attachment of the strip of welt thereto, :a shoe-feeding mechanism has been provided comprising a freely rotatable lower disk I24 rotatablycarrijed by a lu flzt (Fig. 4). held between upwardly extending arms I28 forming a part of the subframe 20. These arms are joined by a cross brace I30 (Figs. 3 and 7). Associated with the lug I25 are ball bearings I32 which are enclosed in a casing I34. The under side of the lower disk I24 is beveled to provide clearance for the cutting-oil knife I00 while the upper face thereof serves to support the outwardly extending-flange F formed bythe material of the shoe on a last L, such as the upper I35. the lining I38 and a middle sole I40 overlying, in an inverted shoe, an insole I42 (Fig. 8). The

upper and lining are thread-lasted to the middle 1 to the angle of the beveled edge of the welting is a driven feed roll I46 rotatable upon a stud I48 (Fig. 8) which is integral with the depending lower end I50 of an arm I52 capabl of a .which forms a part of the feed roll I46.

slight rocking movement upon a cross pin I54 (Fig. 2) inthe mainframe. In this arm I52 is journaleda shaft I56 having at its lower end a gear I56 meshing with a pinion I60 (Fig.4)

On the upper end of the arm'is a helical gear I62 meshing with the helical gear 82 on the driven shaft 00.' The lower end of the arm I52 is guided between extensions I64 of the upright arms I 28. This arm I52 is'connected by a link I66 (Fig. 2) with a pivotally mounted cover I68 swinging on a pin'I'IO at the top of the frame and having a rearwardly extending portion I12 which has a limited movement between stop screws I14 and I16 'and'is normallypressed downwardly by a spring I18 in a direction to lift the upper feed roll I46. After the flange F of the shoe has been inserted between the disk I24 and the feed roll I46, a dperession of'tlie' treadle connected to the treadle'rod 96 will be effective to "bring the feed rolls together because 'theupper end of the rod 92 passes through an eye I 'on' the arm I12 and the rod has fixed to it a flange I82 beneath this eye. Locknuts'l84 on the upper end of the rod rest, against the upper side of the eye I84 and cause the cover to swing with up and down mo ents ofthe rod. I I

"Although itfwi ll be understood that the welt strip w may have its beveled edge I (Fig. 6) precoated with cement which is tacky and thus is'ready to attach the strip to the shoe-flange F, it is found desirable, in some instances at least,

toapply'acoating of cement directly to the welt strip and preferably also to the shoe flange just before they are brought together as thewelt strip isguided and fed by the disks I0, I4 and as the shoe is guided and fed by the engagement of thedriven roll I46 and the supporting disk I24 with the flange F of the shoe. In order that the attaching cement may set'quickly, it'will be found convenient to utilize a thermoplastic adhesive,

such as one of the vinyl resins,- and to extrude it through'a heated nozzle under pressure. To

this end, the machineis provided with a nozzle supplied in any desired fashion; One suitable mechanism for supplying such an adhesive in liquid form and under pressure is illustratedin Letters Patent of the United States No. 2,301,202,, granted November 10,; 1942, upon the application of Paul H. Dixon. wherein there is shown a heated receptacle and pump the outlet of which is operator-controlled by a valve. A-rod'2i3 (Fig: ,2) attached to the treadle-operated lever 94 is-arranged to open the pump valve'tnot shown) as the work feeds are started. In order to prevent hardening of the material in the nozzle itself, the latter is provided with a heating unit 2". It will be. noted, furthermore, from Figs. '7' and. 8 that the nozzle casting is providedwith a guidewev are through which the welt strip Wis led as it is, brou ht up to the feed disks it, and it.

Immediately alter the attachment of the welt strip t the shoe and while the flange Fis still gripped between the feed rolls M6 and the disk [24, a large part. of the upstanding portion of the flange is trimmed'from the shoe by means of a bell-shaped knife 22!] (Figs. 1 and 2) journaled in a slide 222 which is adjustable,alongagrooved carrier 224 by means of a hand wheel 226. This adjustment serves, to compensate for the wear of the knife 220. as it is sharpened.

This knife is driven by means-of a train of gears 22B, 230 and 232, the latter of which meshes with the gear 18 irrespective of the adjusted position of the knife-carrying slide 222. An arrangement of this sort is more fully illustrated and described in Letters Patent of the United States No. 1,974,487, granted September 25, 1934, upon the application of Andrew Eppler, and, as in that patent, means forsharpening the. cutting knife is Provldedin the form of agrinder- 234 to which power may be supplied by means of'a belt 236 passing at its lower end-over a, pulley 238. and adapted to be. driven, by abelt 24ll-irom a suitable source of power whenever an associated clutch is'closed by movement of a hand lever 242.

In the use of the machine, a welt strip W from a suitable source of supply will be introduced in the guideway 2 l6 of the nozzle and pressed into the notch formed between the flanges of the disks In and M in such a position that the square edge of the welt is against the bottom of that groove, and the beveled edge I90 thereof is on the side toward the operator. It will be understood that the disks grip the welt as they come together adjacent to the shoe and then release it again as they move away from the shoe under the action of the spring-pressed drag-finger 36 which bears on the lower disk 14. A shoe having a flange F ready for the attachment thereto of the welt will be presented to the machine with its flange between the feed rolls I24, I45. Assuming, then, that the machine is in operation and that a suitable supply of cement is delivered to the hose M2, the operator will depress the treadle connected to the treadle rod 96, thus closing the clutch B6 to drive thefeed for the welt strip and lowering the upper feed roll MB to grip the shoe flange. At the same time, the rod 2l3 will cause the adhesive to be supplied under pressure to the nozzle 200. The two parts to be joined adhesively will be carried along at corresponding rates, and cement will be extruded upon the shoe flange and upon the beveled face of the welt. As the work is fed, the operator will press the shoe against the machine to bring the shoe flange into a close contact with the beveled edge of the welt as it issupportcdby the. disks l0 and II and will turn the shoe'to bring-its whole periphery into engagement with: that strip while, at the same time; the flange will be trimmed by the knife-220. 'Atthe end or theoperation, the operator will re lease the treadle connected to the rod 96 and will depressthe'treadle connected to the rod I IE to cause-a forward movement of the knife blade I00 to sever the welt strip at a, point where it is gripped by the disks l0 and M. In so doing; it will be assured that the knife will pass through one-of the radial-clutches H8 in the upper disk because of the action of the pointed wedge I22 upon the star wheel no associated with the drive for the upper disk. The pump valve will prevent more-cement from being forced out until another shoe is presented thereto. 1

Having thus described my inventiomwhat I claim asnewand desire to secure by Lettersat= ent of the United States is:

1. In a machine for attaching strip welting to the flange.v of a shoe, means for feeding the shoe past an operating point, and weltrstrip-feeding means for presenting a portion of a welt strip in a predetermined relation to said feeding means. 4

2. In a machine for attaching strip welting to the flange of a shoe, feeding means gripping the flange to feed the shoe past an operating point, and welt-'strip-feeding means for presenting a portion of a welt strip in a predetermined relation to said feeding means.

3.111s machine for attaching strip welting to the flange of a shoe, feeding means gripping the flange to'feedj the shoe past an operating point, wel-t.-strip-i'eeding means for presenting a portion of a welt strip, in a predeterminedrelation tosaid shoe-feeding means, and means for trimming away a portion of they material Ierming the fianseas it leavessaid feeding mechanism.

A. .In arnachine for attaching a tr p welting t the flange of, a shoe, separable feed rolls. gripping flanged upper material adjacent to the inseam and arranged thus to feed the shoe past an operating point, and a welt-strip-feeding mechanism gripping the upper and lower faces of a welt strip and supporting a portion of it in predetermined relation to said feed rolls.

5. In a machine for adhesively attaching strip waiting to the flange of a shoe, separable feed rolls arranged to grip flanged upper material adjacent to the inseam and arranged thus to feed the shoe past an operating point, a welt-stripfeeding mechanism gripping the upper and lower faces of a strip and supporting a portion of it in predetermined relation to said feed rolls, and means adjacent to the discharge side of said feed rolls for trimming away a portion of the material gripped by said rolls, thus leaving a projecting flange adjacent to the inseam to which a welt has been adhesively attached.

6. In a machine for adhesively attaching strip welting to the flange of a shoe, shoe-guiding means, welt-strip-guiding and gripping means presenting an edge portion of the welt strip ad- J'acent to said guiding means, and means for applying cement to said edge portion just before the flange of the shoe is brought into contact therewith.

7. In a machine for adhesively attaching strip waiting to the flange of a shoe, shoe-guiding means, strip-feeding means for gripping a welt and presenting an edge portion thereof to a shoe flange positioned by said guiding means, and means for applying cement to the coacting sur- .Iacesiof thezweltiandthe shoe flang aha? point where :the ?two arev approaching each other;

" 8; In"a machine for adhesively attaching strip lw'eltin'g; to the flangeyof 1a; shoe, shoe-guiding means; rotary means-ior feeding a welt strip 'curvedito-presente portion. of it to .the flange of the shoe; and a cementrapplying nozzle i adjacent to. a; :curved portion ofr said strip-presenting means-rand through which cement may be extruded upon'the welt strip and the shoe flange to attach-them as they-are-brought together; "-79. lnatmachinezfonadhesively attaching strip welting having'a beveled; edge to the inclined flange pf a'shoe; shoe-feedingmeans for gripping -sa id;;flange and 'presentingitatan inclined relation; welt-strip-feeding -means arranged to present the beveled portion-0f a: strip to thecorrespondingly inclined flange of the shoe, and mi 'el fisiil ll x lfiiipg e trmrwn I w {one of said shoe parts jnstpricr to their mutual contact. v 1 r 10. In a machine for adhesively attaching a welt strip having a lbeveled edge to the inclined flangeof a shoe, welt-strip-guiding and feedin means comprising a substantially horizontally M disposed face contacting with the upper surface of a welt strip; means arranged for contact with thelower face of the strip to grip it and feed it,:and flange-gripping and feeding device arranged at an inclination to the horizontal, thereby to hold the shoe flange at an angle corresponding'to the angleof the bevel of the edge of the welting. 1 1 V V 4 7 -11. In a machine for progressively attaching beveled-edge strip welting to the outturned flange of a shoe adjacent to the welt crease, meansfor grip-pinga, section of the welt strip and rigidly holding it with its beveled edge in a position for attachment adjacent to the welt crease, means adjacent to the first-named means arranged to 'griprthe opposite sides of a shoe flange and to advance it at a rate corresponding to the'advancement of the welt strip, and means for ap- :pl'yin'gan adhesive-tothe beveled edge of'thewelt st ip dustprior to its engagement with the-welt crease. r 7' 12. In a machine for progressively attaching beveled-edge strip welting to the outturned flange of a shoe adjacent to the welt crease, a disk having a peripheral groove therein frictionally to receive and engage the opposite sides of a welt strip; said disk being rotatable to advance a length ofiwelting into a position to be laid into the welt crease, means adjacent to the disk arranged to grip the opposite. sides of the flange and to advance it at a rate corresponding to the advancement ofthe'welt, strip, and means for applying anadhesive to the beveled edge of the welt strip just prior to its engagement with the Walt crease.

13. In a machine. for adhesively attaching strip welting toa flangecon a shoe, separablefeedrolls ofvl'attachment to the shoe, means'for applying cement to at least'one of the parts to be attached prior'to contact between them, and means for trimming away a, portion of the material forming the flange as it'leave said feeding mechanism. l4. In a machine for adhesively attaching strip welting' having a lbeveled edge to the inclined flangefof a shoe, separable feed rolls gripping said flange and presenting it in inclined rela- 'tion, rotary means for, feedinga welt strip along a curve tangent, tolthe flange held by the feed rolls for attachment'at that point, a cementapplying nozzle adjacent to acurved portion of saidro'tary means for the application of cement to the'coacting surfacesof the welt andthe shoe flange at at po'int'where the two are approaching each other fand'a trimmer adjacent to the delivery sidecf said'ieed rolls for removing a portion of the flange outsideof its point of attachmentto the welt strip. Y JOHN RIOLIVER. 

